India, Jan. 27 -- Jessica Pegula knocked podcast pal and defending champion Madison Keys out of the Australian Open on Monday and moved into a quarterfinal against Amanda Anisimova, another all-American match.

Their fourth-round wins on Day 9 meant four Americans reached the women's singles quarterfinals in Australia for the first time since 2001, when Serena and Venus Williams, Jennifer Capriati, Monica Seles and Lindsay Davenport made it to the last 8. "Sucks that one American has to go out in the quarterfinals," Anisimova said.

Pegula had a slightly different view: "At least one of us will get through, and I think that's great for American tennis." "Yeah, it's been pretty crazy how well the women have been doing and how many top-rank...